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Semtech Corporation 1N3612
- Part No.:
- 1N3612
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
1N3612.pdf
- Description:
- DIODE GEN PURP 400V 1A AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:7,576
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Product details
Overview
TDS2211P from Semtech is a transient diverting suppressor designed to protect 22V-rated I/O or power lines against high-energy EOS events including ESD (±30kV contact/air), EFT (±4kV), and surge (40A, 8/20μs). It uses a surge-rated FET with precision trigger circuitry to deliver stable clamping voltage across temperature and current range, enabling robust protection in USB Type-C PD and industrial load switch inputs.
For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include its constant 27.5–28V clamping at 24–40A, 20mΩ dynamic resistance, 175pF junction capacitance at 22V, DFN 1.6×1.6mm 6-lead package, and compatibility with ±1kV IEC 61000-4-5 unsymmetrical line testing.
Technical Context
The TDS2211P implements a voltage-triggered shunt architecture: a precision reference circuit detects overvoltage exceeding ~25V breakdown, activating a low-RDS(on) FET to divert transients to ground. Unlike conventional TVS diodes, its clamping voltage remains nearly flat (27.5–28V) from 24A to 40A due to decreasing FET on-resistance under surge.
This architecture delivers stable protection across –40°C to +125°C operating temperature, with <20mΩ dynamic resistance measured between 1A and 40A (8/20μs), and maintains <600nA reverse leakage at 22V. Its functional diagram confirms three parallel input terminals (pins 4–6) and three ground terminals (pins 1–3) for low-inductance, high-current path design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC or RMS operating voltage on protected line without leakage or degradation |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave, RS=2Ω) - ensures downstream ICs (e.g., USB PD controllers) remain below damage threshold during worst-case surge |
| Peak Pulse Current | 40A (8/20μs) - supports compliance with IEC 61000-4-5 Level 4 industrial surge immunity requirements |
| ESD Withstand | ±30kV contact & air per IEC 61000-4-2 - exceeds Level 4 human-body model requirements for front-panel and connector interfaces |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for 22V bus protection without signal integrity impact on moderate-speed lines (e.g., USB 2.0, load switch enable) |
| Dynamic Resistance | 20mΩ - enables flat clamping by minimizing IR drop increase as surge current rises from 1A to 40A |
| Package | DFN 1.6mm × 1.6mm × 0.55mm, 6-lead - enables compact placement near connectors with minimal PCB area and thermal mass |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, RoHS-compliant, UL 94V-0 molding compound, lead-free finish. Pin 1 marked with laser dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected with low-inductance vias to maximize 40A capability |
| Pins 4, 5, 6 | IN | Parallel-connected input terminals for protected line (e.g., VBUS); all three required for full 40A rating and minimized trace inductance |
Key Features
| Feature | Design Value |
|---|---|
| Constant clamping voltage vs. current | 27.5–28V across full 24–40A rated pulse range - eliminates need for overrating to meet clamping budget at high temperature |
| Temperature-stable clamping | Clamping remains ~27.5V from –40°C to +125°C - enables reliable protection in industrial environments without derating |
| Low dynamic resistance | 20mΩ - reduces voltage overshoot during fast-rising transients and improves energy handling efficiency |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz bursts) - protects against repetitive switching noise in motor drives and PLCs |
| Compact DFN footprint | 1.6mm × 1.6mm - saves >50% board space versus SO-8 or SOT-23 TVS solutions while supporting same 40A surge rating |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V VBUS lines in USB-C receptacles where PD negotiation exposes controller ICs to lightning-induced surges and hot-plug transients. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at connector, clamping surges before they reach USB PD controller or e-fuse IC. Use Value: Maintains 27.5V clamping at 40A and 125°C - avoids overvoltage damage to 24V-tolerant PD controllers that would occur with conventional TVS devices rising to >38V. |
Use Scenario: Safeguarding input pins of high-side load switches (e.g., HS2950P) in remote meters, robotics, and IoT edge nodes exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary EOS shunt device limiting voltage across load switch FET drain-source during 1.2/50μs + 8/20μs combo-wave transients. Use Value: Prevents gate oxide rupture and avalanche failure in load switch internal FET by holding clamping voltage below 28V regardless of ambient temperature or surge amplitude up to 40A. |
| Storage Device Power Bus Protection | Notebook/Tablet VBUS Line Protection |
Use Scenario: Securing 19–22V auxiliary power rails in NVMe SSD enclosures and external HDD docks subject to ESD from user handling and cable coupling. IC Role / Device Role / Timing Role: Solid-state transient suppressor replacing Zener-based or polymer TVS solutions on main power input traces. Use Value: Delivers ±30kV ESD immunity and 40A surge rating in 1.6mm² footprint - enables thinner, lighter enclosures without sacrificing reliability certification. |
Use Scenario: Protecting 20V VBUS paths in ultrabooks and tablets where space constraints limit use of larger TVS packages and thermal management is restricted. IC Role / Device Role / Timing Role: Low-capacitance (175pF), low-leakage (≤600nA) shunt protector placed adjacent to USB-C port PCB entry point. Use Value: Enables direct integration into dense motherboard layouts with no signal integrity penalty on 22V rail, while meeting IEC 61000-4-2/4-5 compliance without layout redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A (8/20μs); higher clamping, no temperature stability | Higher clamping voltage increases risk of downstream IC damage at elevated temperature or full 40A surge | Use only where cost sensitivity outweighs clamping performance and thermal margin requirements |
| SP1003-220K | Bi-directional TVS array; 22V VRWM, 37.5V VC @ 12A; 150pF typical; no FET-based clamping control | Limited to lower peak current (12A), not rated for ±1kV IEC 61000-4-5 unsymmetrical line testing | Suitable for ESD-only protection on lower-energy lines; insufficient for industrial surge immunity |
Compared with SMAJ22A and SP1003-220K, the TDS2211P provides superior surge robustness via its FET-triggered architecture-delivering 40A capability with flat 27.5V clamping across temperature, whereas alternatives exhibit rising clamping (>35V) and reduced current rating, requiring larger footprints or system-level derating.
Availability
TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and notebook VBUS protection requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for TDS2211P includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Semtech Corporation is a U.S.-based fabless semiconductor company specializing in analog and mixed-signal ICs for precision sensing, protection, and connectivity.
The TDS family was developed to replace conventional TVS diodes in high-reliability 20–30V power and data line protection, addressing limitations in clamping stability, temperature drift, and surge current scalability.
FAQ
What is the maximum continuous operating voltage for TDS2211P?
The TDS2211P has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously withstand up to 22V DC or RMS on its input terminals without significant leakage or degradation. This makes TDS2211P suitable for protecting 20V USB PD buses and other 22V-rated power rails where sustained voltage operation is required.
How does TDS2211P achieve constant clamping voltage across varying surge currents?
The TDS2211P uses a precision trigger circuit to activate a low-RDS(on) surge-rated FET when overvoltage is detected. As surge current increases, the FET's on-resistance decreases, counteracting IR rise and maintaining clamping voltage near 27.5–28V from 24A to 40A. This behavior is confirmed in the datasheet's clamping vs. current curves and distinguishes TDS2211P from conventional TVS diodes.
Can TDS2211P be used for bidirectional signal line protection?
No - TDS2211P is a unidirectional transient suppressor designed specifically for positive-going overvoltage events on power or single-ended I/O lines. Its electrical characteristics (e.g., forward voltage of 0.5V, reverse breakdown at 25–27.9V) confirm asymmetric conduction. For bidirectional data lines like USB 2.0 D+/D−, a separate low-capacitance TVS such as RClamp3371ZC is recommended alongside TDS2211P.
What is the recommended PCB layout for optimal surge performance of TDS2211P?
For optimal performance, place TDS2211P as close as possible to the protected connector. Connect all three IN pins (4–6) via a single short, wide trace to the protected line, and tie all three GND pins (1–3) directly to a solid ground plane using multiple low-inductance vias. Avoid thermal pads - energy is dissipated in the silicon FET, not the package, per Semtech's layout guidelines.
Is TDS2211P compliant with IEC 61000-4-5 for industrial surge immunity?
Yes - TDS2211P is explicitly rated for ±1kV (1.2/50μs voltage, 8/20μs current, RS = 42Ω) on unsymmetrical lines and 40A (8/20μs) per IEC 61000-4-5. Its clamping voltage remains ≤28V under these conditions, enabling system-level compliance when combined with proper layout and upstream filtering. The datasheet confirms this rating in both Absolute Maximum Ratings and Electrical Characteristics tables.
1N3612 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- Axial
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 1 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 2 µs
- Current - Reverse Leakage @ Vr:
- 500 nA @ 400 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
- Operating Temperature - Junction:
- -65°C ~ 175°C
1N3612 FAQ
1.How can I place an order for 1N3612 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3612 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1N3612 reliable?
The price and inventory of 1N3612 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N3612 is usually 5 days.
3.What payment methods are accepted for 1N3612?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3612 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3612?
1N3612 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3612 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1N3612?
For technical support, including 1N3612 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3612 requirements.
6.How does Aetrix verify that 1N3612 is sourced from the original manufacturer or authorized distributors?
All 1N3612 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N3612 meets industry standards.
7.What is the process for return or replacement of 1N3612?
All 1N3612 units undergo pre-shipment inspection (PSI). If there is an issue with 1N3612, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1N3612 part is unused and in its original packaging.
Return procedure for 1N3612:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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